I make many variations on this Delia-type (the Delia of How To Cheat at Cooking, I mean) salad, as an easy lunch for 4. It might include rice, artichoke hearts, lettuce - any number of ingredients.
2 tins tuna (in spring water, or brine)
1 tin butter beans, drained and rinsed
20 black olives, stoned (I like Crespo "Greek-style")
12 cherry tomatoes, halved
12 sun-dried tomatoes, each cut into 3
Salt (you won't need much), pepper
Mix the ingredients. That's it. If the sun-dried tomatoes come in oil, and you include it in the salad, so much the better.